Console I/F (RS232C)

 

Himalaya 2.0

 

 

Switch

CL-SH8671

40.0 MHz

 

 

 

Flash ROM

 

MCU

 

 

ARM7TDMI

 

 

64K × 16 bits

 

 

 

 

 

 

 

 

RDC

 

 

ATA

CL-SH3515

 

 

 

 

 

 

Series Termination

 

HDC

 

 

 

SH7661

 

 

I/F

 

Head IC

SVC

 

 

 

 

 

SR1756

HA13627

– PIO Mode-4

 

 

 

 

– Multiword DMA Mode-2

 

 

 

 

– Ultra DMA Mode-4 (66.6MB/s)

Buffer

Bandwidth = 160.0 MB/s

R/W

SPM/VCM

– Ultra DMA Mode-5 (100MB/s)

 

 

control

 

 

 

 

Data Buffer

 

 

 

256K × 16 bits

 

 

 

 

Option

 

 

 

(1024K × 16 bits)

 

 

Figure 4.2 MPG3xxxAT Block diagram

4.4Power-on Sequence

Figure 4.3 describes the operation sequence of the disk drive at power-on. The outline is described below.

a)After the power is turned on, the disk drive executes the MPU bus test, internal register read/write test, and work RAM read/write test. When the self-diagnosis terminates successfully, the disk drive starts the spindle motor.

b)The disk drive executes self-diagnosis (data buffer read/write test) after enabling response to the ATA bus.

c)After confirming that the spindle motor has reached rated speed, the disk drive releases the heads from the actuator magnet lock mechanism by applying current to the VCM. This unlocks the heads which are parked at the inner circumference of the disks.

d)The disk drive positions the heads onto the SA area and reads out the system information.

e)The disk drive executes self-seek-calibration. This collects data for VCM torque and mechanical external forces applied to the actuator, and updates the calibrating value.

f)The drive becomes ready. The host can issue commands.

C141-E110-02EN

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Fujitsu MPG3XXXAT manual Ata